bush won, and bill clinton. we have third-party candidates now. they are not as prominent perhaps has ross perot or other third-party candidates. a question on twitter. what have we lost by excluding third-party candidates from the debates? >> we have lost a third party candidates. [laughter] >> obviously, some third party supporters. i mean this in i hope an objective way, but in these candidates, do they bring something to the debate? >> we lose risk, meaning, people willing to take a risk. these people are already behind, not likely a person to be chosen. when you think about the primary season's, often times those are more productive because you have people like ron paul, carol moseley-braun, willing to make statements covering a question that the other primary candidates will not make because there is to read it -- too much risk for them. one of the thing that the third party candidate to is move the discourse in ways that are not allowable when you have just the two candidates. >> before we even have presidential debates, our system is rigge